129434 has 4 divisors (see below), whose sum is σ = 194154. Its totient is φ = 64716.

The previous prime is 129419. The next prime is 129439. The reversal of 129434 is 434921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120409 + 9025 = 347^2 + 95^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (129439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32357 + ... + 32360.

2¹²⁹⁴³⁴ is an apocalyptic number.

129434 is a deficient number, since it is larger than the sum of its proper divisors (64720).

129434 is an equidigital number, since it uses as much as digits as its factorization.

129434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64719.

The product of its digits is 864, while the sum is 23.

The square root of 129434 is about 359.7693705695. The cubic root of 129434 is about 50.5843442325.

The spelling of 129434 in words is "one hundred twenty-nine thousand, four hundred thirty-four".